کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7054146 1458016 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel measurement of receding wicked liquid responsible for critical heat flux enhancement
ترجمه فارسی عنوان
اندازه گیری رؤیایی مایع نجیب زاده که باعث افزایش شار گرمای شدید می شود
کلمات کلیدی
بازنشسته شدن وایکینگ، خط تماس شار گرمای انتقالی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
In-situ hydrodynamic behavior of wicked liquid comes from interfacial dynamics at triple contact line, resulting in receding motion around expanding dry spot. We here introduce a new and creative technique of wicking experiment adopting an external pressure source equivalent to bubble nucleation pressure in order to investigate the receding behavior of wicked liquid. On the various types of surface morphology including smooth, nanostructure, nanoporous, and microstructure, it was clearly observed that wicked liquid receded from expanding dry area except for a smooth surface. The receding velocity was slower at microstructure, nanoporous, and nanostructure, in order. Clearly this result provides a hydrodynamic evidence of smaller dry area size and contact line length on microscale structure than on nanoscale structure. Moreover, the diameter of dry area showed a linear relation with CHF enhancement that indicates smaller diameter of dry area is more effective to delay irreversible expansion of dry spots. This novel observation is expected to provide reliable analysis of contact line dynamics with CHF enhancement on wicking-dominant surfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 124, September 2018, Pages 150-157
نویسندگان
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